-ing bbbb bbbs bbin bbng bbrg bggs bgst bgun bibb bibi bibs bigb bigg bign bigs bigt bigu biin biis bin- bing bini binn bins bint binu birb birg biri birn birr birs birt biru bis- biss bist bisu bits bitt bitu bnib bnin bnrr bnss brig brin bris brit brns brrr brrs brsb brsr brst brug brun brus brut bsgs bsin bsns bsts btrt btss bttb btus bubb bubi bubs bubu bugg bugi bugs buin buir buis buit buiu bunb bung buni bunn buns bunt bunu bur- burb burg buri burn burr burs burt buru busi buss bust busu but- buti buts butt buus gbbs ggbt gggg ggrn ggss gibb gibs gigg gigi gign gigs giis ging gini ginn gins ginu girg giri girn girr girs girt giru giss gist gits giur gius gnib gnin gnit gnrr gnti gnus grbr grib grig grin gris grit grni grrr grrs grss grub grug grui grun grur grus grut gsis gstr gsur gtbr gubb gubi gubs gubu gugb gugg gugi gugu guib guin guis gung gunn guns gunt gurb gurg guri gurn gurr gurs gurt guru gusb guss gust guti guts gutt gutu guus ibis ibns ibri ibsn ibss ibtb ibts ibus iggs igis igni igns ignu igri igus iiii iiis iiit iirs iisi iisr iist iisu iitr iitt ings inig inis init inni innr inns innu inri inrs inss inst insu intg inti intn intr ints intu inui inun inus irgs iri- irig irin iris irri irrs irsg irti irts irun irus isbn isbt isin isis isit isnt isrg isri issi issr isss issu isti istr ists isus itbs itgs itin itis itri itrs itsi itsu itur iugs iuiu iuss iust n-ii nbti ngns ngri ngsn ngtn ngts ngur nguu nibi nibs nigg nigs nigt niir niit niiu ning nini nins nirs nirt niru nisi niss nist nisu nitb niti nitr nits niur nngn nnit nnnn nnss nntn nrts nsin nsis nsnr nssb nssr nsss nsts nstu nsub ntis ntnu ntru ntsb ntss ntsu nttr ntui nubi nubs nugs nuin nuit nung nunn nuns nunt nuri nurn nurr nurs nurt nuru nusi nuss nust nusu nuts nutt nutu rbbb rbbr rbbs rbis rbss rbst rgbi rgit rgtr rgts rib- ribs ribu rigg rigi rigs rigu riin riis ring rinn riri rirs risi riss rist risu riti rits ritt ritu rius rnbr rngs rnin rnnt rnut rrrr rrun rsbi rsgb rsis rsnn rsnr rsts rstu rtgs rtns rtss rtts rubb rubi rubs rubu rugg rugi rugs ruin ruis ruit rung runi runn runs runt ruri rurs ruru rusi russ rust rusu ruti ruts rutt rutu ruun s-ib s-ii sbbs sbig sbsi sbst sbtn sbus sggg sggs sgss sgts sibi sibs sibu sigg sigi sign sigs siit sing sini sinn sins sint sinu siri sirr sirs sirt siru sisi siss sist sisu sit- siti sitn sits sitt situ siui sius siut snib snig snir snit snns snrs sntr snub snug snur snus srgb srib sris srni srnn srtr srub ssbn ssbr ssgs ssgt ssin ssis ssit ssns ssrg ssri ssrs sssb sssi ssss sstb ssts stbs stgr stib stig stir stis stit stng stnn stnr stns stri strn strs stru stsi stss sttr stub stug stun stur stus stut sub- subb subg subi subs sug- sugg sugi suig suin suir suis suit sun- sunb sung suni sunn suns sunt sunu sur- surg suri surn surr surs surt suru sus- susi suss sust susu suti sutu suus tbbs tbgs tbit tbrb tbst tgts tibi tibs tibu tigi tigr tigs tiit tiiu ting tini tinn tins tint tinu tirb tiri tirr tirs tiru tisb tisi tiss tist titi tits titt titu tngs tnts tnut tri- trib trig trin tris trit trng trsi trst trtr trub trug trun trus trut truu tsgt tsig tsin tsis tssg tssi tssr tsst tsts tsui tsun ttbb ttss tttt tubb tubr tubs tubu tugg tugs tugu tuig tuin tuis tuit tuiu tunb tung tuni tunn tuns tunu turb turg turi turn turr turs turt turu tusi tuss tust tuti tuts tutt tutu ubbi ubii ubir ubis ubit uggs uggt ugis ugni ugri ugur uguu uint uirr uist uits ungu uni- unii unin unir unis unit unni unns unrs uns- unsg unst untb unts unus unut urbi urbs urgi urgu urib urin uris uriu urni urns urri ursi urss ursu urts urun urur urus urut usbr usbs usin usis usnr usnu ussb ussr usss usst ussu ustb usti usts usui usun usus utin utis utri utti uttu utug uuni uuri uusi uuuu